Cast and Crew of Johnny Test

Johnny Test

How much trouble could one imaginative boy, his faithful dog and two science-loving sisters possibly get into? Hmm, that sounds like a challenge!

Full Cast of Johnny Test

James Arnold Taylor as Johnny Test (voice)

James Arnold Taylor

as Johnny Test (voice)

James Arnold Taylor (born July 22, 1969) is an American voice actor, writer, producer and podcast host, known for por...

Ashleigh Ball as Mary Test (voice)

Ashleigh Ball

as Mary Test (voice)

Ashleigh Ball was born on March 31, 1983 and is currently 41 years old.